<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表排序</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <!--准备好一个容器-->
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType =2">年龄升序</button>
        <button @click="sortType =1">年龄降序</button>
        <button @click="sortType =0">原顺序</button>
        <ul>
            <li v-for="(p,index) in filPersons" :key="p.id">
               {{p.name}}-{{p.age}}-{{p.sex}}
            </li>           
        </ul>
    </div>
</body>
<script type="text/javascript">
    Vue.config.priductionTip=false
   
    new Vue({
        el:'#root',
        data:{
            keyWord:'',
            sortType:0,//0代表原顺序 1降序 2升序
            persons:[
                {id:'001',name:'马冬梅',age:19,sex:'女'},
                {id:'002',name:'周冬雨',age:26,sex:'女'},
                {id:'003',name:'周杰伦',age:23,sex:'男'},
                {id:'004',name:'温兆伦',age:45,sex:'男'},
        ],      
        },
        computed:{
            filPersons(){
                const arr = this.persons.filter((p)=>{
                    return p.name.indexOf(this.keyWord) !== -1
                })
                //判断一下是否需要排序
                if(this.sortType){
                    arr.sort((p1,p2)=>{
                        //函数体
                        return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
                    })
                }
                return  arr
            }
        }
    }) 
    
</script>
</html>